For about $9.00, you can buy one similar to the magazine's jig you posted, . Plus, it is a better design as it has a vent for the saw dust. For about twice that, you can get it packaged with a drill bit, stop collar, and wrench.

I think there are places to save money and build your own, but I DON'T think this is one of those places.

Keep in mind that you will also need a drill bit. The HFT pocket hole jig comes with the required drill bit plus a stop that ensures the holes are drilled to the correct depth and not further. It will be very difficult to make your own drill bit.